David Walsh Blog

• By David WalshJanuary 18, 2021

  How to Earn Interest on Bitcoin

  When I was young I remember looking at my bank book and seeing nice interest payments for cash I had in the bank. Fast forward to today and banks are giving essentially nothing for interest -- your money just sits there collecting dust. In an ideal...

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• By David WalshJanuary 11, 2021

  navigator.clipboard API

  Interacting with a user's host clipboard is something web developers have wanted for both good and evil purposes. On the good side, it's nice to allow users to easily copy text like wallet addresses or branch names; for evil, copying malicious text that the user...

• By David WalshDecember 29, 2020

  Goals For 2021

  Every year I write a blog post about my goals for the year but I won't pretend this year's post is the same. I mean how the hell do I create realistic goals knowing what 2020 was and what 2021 inherits?! Pandemic, drastic political...

• By David WalshDecember 28, 2020

  Open a Browser Tab with DevTools Open by Default

  Using command line flags is a great way to subtly improve productivity. Whether saving yourself keystrokes or enabling specific features, it's very much worth knowing the application flags available to you.To launch a new tab with DevTools in Chrome, you can use the --auto-open-devtools-for-tabs command...

• By David WalshDecember 23, 2020

  Return a Default Value with Promises Using catch

  Last week I tweeted all of you looking for your best JavaScript Array and Promise tricks, and as always, it didn't disappoint -- I learned quite a bit!Today's JavaScript Promise trick is brought to you by Claudio Semeraro: how to use catch to...

• By David WalshDecember 22, 2020

  Break a forEach Loop with JavaScript

  I've written a number of blog posts about JavaScript tricks: Promise tricks, type conversion tricks, spread tricks, and a host of other JavaScript tricks. I recently ran into another JavaScript trick that blew my mind: how to break a forEach

• By David WalshDecember 21, 2020

  Sharpen Your JavaScript Skills with Pluralsight

  JavaScript recently turned 25 years old, and while it started by dominating over the client side world, this beautiful programming language is well on its way to taking over the server side. JavaScript isn't just thriving -- it's evolving with new syntax features, patterns, frameworks...

• By David WalshDecember 14, 2020

  React.isValidElement

  Knowing what input type you've received is hugely important in JavaScript, which is a big reason for Flow and TypeScript's rise. One such case where it's useful to know what an object represents is if the input is a string or a React element.To detect...

• By David WalshDecember 4, 2020

  2020 Year in Review

  Looking back on an entire year of one's professional life is difficult, but when you consider everything that 2020 threw at us, where the hell do you even start? Forget just surviving the professional aspect of 2020, we all deserve a medal, both literally and figuratively...

• By David WalshNovember 30, 2020

  10 Amazing Media Tricks Made Possible by Cloudinary

  Cloudinary is my go-to place for transforming and optimizing media before delivery. By simply modifying the URL of an image or video, you can customize its size, presentation, Instagram-like filtering, and various other aspects. I previously posted about the 10 excellent image tricks and...